<template>
    <div class="about">
        <h1>{{id? '编辑': '新建'}}分类</h1>
        <el-form label-width="120px" @submit.native.prevent="save">
            <el-form-item label="上级分类">
                <el-select v-model="model.parent">
                    <el-option v-for="item in parents" :key="item._id"
                    :label="item.name" :value="item._id">
                    </el-option>

                </el-select>
            </el-form-item>
            <el-form-item label="名称">
                <el-input v-model="model.name"></el-input>
            </el-form-item>
            <el-form-item>
                <el-button type="primary" native-type="submit">保存</el-button>
            </el-form-item>
        </el-form>
    </div>

</template>
<script>

export default {
    props: {
        id: {}
    },
    data(){
        return {
            model: {},
            parents: []
        }
    },
    methods: {
       async save(){
           console.log('save');
            //请求一个接口，进行数据的提交
        //   let res;
          if(this.id) {
              await this.$http.put(`api/categories/${this.id}`, this.model)
          } else {
              await this.$http.post('api/categories', this.model)
          }
           //页面进行重定向
           this.$router.push('/categories/list');
           this.$message({
               type:'success',
               message: '保存成功'
           })
        },

        async fetch(){
            const res = await this.$http.get(`api/categories/${this.id}`)
            this.model = res.data
        },

        async fetchParents(){
            const res = await this.$http.get(`api/categories`)
            this.parents = res.data
        },
    },
    created () {
        this.fetchParents()
        this.id && this.fetch()
    }
}
</script>
